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Introduce separate _clear functions for hash module

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This gives the caller more control about whether the state should
be cleaned (= should be considered secret). Moreover, it gives the
caller the possibility to clean a hash struct without finalizing it.
This commit is contained in:
Tim Ruffing
2020-04-27 18:55:36 +02:00
committed by Sebastian Falbesoner
parent 99cc9fd6d0
commit 349e6ab916
8 changed files with 26 additions and 7 deletions
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2
src/modules/ellswift/main_impl.h
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@@ -510,6 +510,7 @@ static int ellswift_xdh_hash_function_prefix(unsigned char *output, const unsign
secp256k1_sha256_write(&sha, ell_b64, 64);
secp256k1_sha256_write(&sha, x32, 32);
secp256k1_sha256_finalize(&sha, output);
secp256k1_sha256_clear(&sha);
return 1;
}
@@ -539,6 +540,7 @@ static int ellswift_xdh_hash_function_bip324(unsigned char* output, const unsign
secp256k1_sha256_write(&sha, ell_b64, 64);
secp256k1_sha256_write(&sha, x32, 32);
secp256k1_sha256_finalize(&sha, output);
secp256k1_sha256_clear(&sha);
return 1;
}